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ISL6569A の電気的特性と機能

ISL6569AのメーカーはIntersil Corporationです、この部品の機能は「Multi-Phase PWM Controller」です。


製品の詳細 ( Datasheet PDF )

部品番号 ISL6569A
部品説明 Multi-Phase PWM Controller
メーカ Intersil Corporation
ロゴ Intersil Corporation ロゴ 




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ISL6569A Datasheet, ISL6569A PDF,ピン配置, 機能
®
Data Sheet
November 2003
ISL6569A
FN9092.1
Multi-Phase PWM Controller
The ISL6569A provides core-voltage regulation by driving
two interleaved synchronous-rectified buck-converter
channels in parallel. Interleaving the channel timing results
in increased ripple frequency which reduces input and output
ripple currents. The reduction in ripple results in lower
component cost, reduced dissipation, and a smaller
implementation area.
The ISL6569A uses cost and space-saving rDS(ON) sensing
for channel current balance, active voltage positioning, and
over-current protection. Output voltage is monitored by an
internal differential remote sense amplifier. A high-bandwidth
error amplifier drives the output voltage to match the
programmed 5-bit DAC reference voltage. The resulting
compensation signal guides the creation of pulse width
modulated (PWM) signals to control companion Intersil
MOSFET drivers. The OFS pin allows direct offset of the
DAC voltage from 0V to 50mV using a single external
resistor. The reference and amplifiers are trimmed to ensure
a system accuracy of ± 0.5% over temperature.
Outstanding features of this controller IC include
Dynamic VIDTM technology allowing seamless on-the-fly VID
changing without the need of any external components.
Output voltage “droop” or active voltage positioning is
optional. When employed, it allows the reduction in size and
cost of the output capacitors required to support load
transients. A threshold-sensitive enable input allows the use
of an external resistor divider for start-up coordination with
Intersil MOSFET drivers or any other devices powered from
a separate supply.
Superior over-voltage protection is achieved by gating on the
lower MOSFET of all phases to crowbar the output voltage.
An optional second crowbar on VIN, formed with an external
MOSFET or SCR gated by the OVP pin, is triggered when
an over-voltage condition is detected. Under-voltage
conditions are detected, but PWM operation is not disrupted.
Over-current conditions cause a hiccup-mode response as
the controller repeatedly tries to restart. After a set number
of failed startup attempts, the controller latches off. A power
good logic signal indicates when the converter output is
between the UV and OV thresholds.
Features
• Multi-Phase Power Conversion
- 2 Phase Operation
• Active Channel Current Balancing
• Precision rDS(ON) Current Sharing
- Lossless
- Low Cost
• Input Voltage: 12V or 5V Bias
• Precision CORE Voltage Regulation
- ± 0.5% System Accuracy Over Temperature
- Differential Remote Output Voltage Sensing
- Programmable Reference Offset
• Microprocessor Voltage Identification Input
- 5-Bit VID Input
- 0.800V to 1.550V in 25mV Steps
- Dynamic VIDTM Technology
• Programmable Droop Voltage
• Fast Transient Recovery Time
• Over Current Protection
• Digital Soft Start
• Threshold Sensitive Enable Input
• High Ripple Frequency (160kHz to 2MHz)
• QFN Package:
- Compliant to JEDEC PUB95 MO-220
QFN - Quad Flat No Leads - Package Outline
- Near Chip Scale Package footprint, which improves
PCB efficiency and has a thinner profile
Applications
• AMD Hammer Family Processor Voltage Regulator
• Low Output Voltage, High Current DC-DC Converters
• Voltage Regulator Modules
Ordering Information
PART NUMBER TEMP. (oC) PACKAGE PKG. DWG. #
ISL6569ACB
0 to 70 24 Ld SOIC M24.3
ISL6569ACB-T 24 Ld SOIC Tape and Reel
ISL6569ACR
0 to 85 32 Ld 5x5 QFN L32.5x5
ISL6569ACR-T 32 Ld 5x5 QFN Tape and Reel
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2003. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.

1 Page





ISL6569A pdf, ピン配列
Block Diagram
PGOOD
VID4
VID3
VID2
VID1
VID0
DYNAMIC
VID
DAC
UV
FB
COMP
e/a
ISL6569A
VCC
EN
1.23V
FS
6V
POR
AND
SOFT START
OSCILLAT0R
AND
SAWTOOTH
+
+
-
+
-
+
OFS
VDIFF
VSEN
RGND
IDROOP
x0.1
100µA
OV
2.2V
90µA
diff
OC
AVERAGE
1/2
+
+
I1
CURRENT
SENSE
I2
PWM1
PWM2
OVP
ISEN1
ISEN2
GND
3


3Pages


ISL6569A 電子部品, 半導体
ISL6569A
Electrical Specifications Operating Conditions: VCC = 5V, TA = 0o C to 70oC. Unless Otherwise Specified. (Continued)
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNITS
Disable Voltage
Sawtooth Amplitude
IFS/DIS = 1mA
0.8 1.0 1.2
- 1.37 -
V
V
Max Duty Cycle
- 75 -
%
ERROR AMPLIFIER
Open-Loop Gain
Open-Loop Bandwidth
Slew Rate
Maximum Output Voltage
Source Current
RL = 10kto ground
CL = 100pF, RL = 10kto ground
CL = 100pF, Load = ±400mA
RL = 10kto ground
- 72 -
dB
- 18 - MHz
- 7.1 11 V/µs
3.6 4.5
-
V
3.0 7.0 9.0 mA
Sink Current
1.6 3.0 5.4 mA
REMOTE-SENSE AMPLIFIER
Input Impedance
- 80 - k
Bandwidth
- 20 - MHz
Slew Rate
- 6 - V/µs
SENSE CURRENT
IOUT Accuracy
ISEN1 = ISEN2 = 50µA
-5 - 5 %
ISEN Offset Voltage
- 6 - mV
Over-Current Trip Level
72 90 108 µA
POWER GOOD AND PROTECTION MONITORS
PGOOD Low Voltage
Under-Voltage Offset From VID
IPGOOD = 4mA
VSEN Falling
- - 0.4
320 350 420
V
mV
Over-Voltage Threshold
VSEN Rising
2.08 2.13 2.20 V
OVP Voltage
IOVP = 100mA, VCC = 5V
NOTE:
4. These parts are designed and adjusted for accuracy within the system tolerance.
2.2 3.28 4.0
V
6

6 Page



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共有リンク

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部品番号部品説明メーカ
ISL6569

Multi-Phase PWM Controller

Intersil Corporation
Intersil Corporation
ISL6569A

Multi-Phase PWM Controller

Intersil Corporation
Intersil Corporation


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